Uranium hydrogeochemical and stream sediment reconnaissance of the Bozeman NTMS quadrangle, Montana

Bolivar, S.L.

doi:10.2172/6442861

Cited by 6 publications

(6 citation statements)

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“…The following plasmids were used : pJF118EH (Furste et al, 1986), pBR325 (Bolivar, 1978), pCML108 (Lin-Chao et al, 1994), pLH1c and pBAD-PCN. pBR325 and pJF118EH, closely similar pBR322-based replicons, were used interchangeably to produce RNAI.…”

Section: Methodsmentioning

confidence: 99%

Absence of RNase III alters the pathway by which RNAI, the antisense inhibitor of ColE1 replication, decays

et al. 1999

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RNAI is a short RNA, 108 nt in length, which regulates the replication of the plasmid ColE1. RNAI turns over rapidly, enabling plasmid replication rate to respond quickly to changes in plasmid copy number. Because RNAI is produced in abundance, is easily extracted and turns over quickly, it has been used as a model for mRNA in studying RNA decay pathways. The enzymes polynucleotide phosphorylase, poly(A) polymerase and RNase E have been demonstrated to have roles in both messenger and RNAI decay ; it is reported here that these enzymes can work independently of one another to facilitate RNAI decay. The roles in RNAI decay of two further enzymes which facilitate mRNA decay, the exonuclease RNase II and the endonuclease RNase III, are also examined. RNase II does not appear to accelerate RNAI decay but it is found that, in the absence of RNase III, polyadenylated RNAI, unprocessed by RNase E, accumulates. It is also shown that RNase III can cut RNAI near nt 82 or 98 in vitro. An RNAI fragment corresponding to the longer of these can be found in extracts of an rnc M pcnB strain (which produces RNase III) but not of an rnc pcnB strain, suggesting that RNAI may be a substrate for RNase III in vivo. A possible pathway for the early steps in RNAI decay which incorporates this information is suggested.

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Section: Methodsmentioning

confidence: 99%

Absence of RNase III alters the pathway by which RNAI, the antisense inhibitor of ColE1 replication, decays

et al. 1999

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“…Stream sediment data included in this report were collected to fill in some areas that were not covered in the systematic stream sediment surveys conducted for the National Uranium Resource Evaluation (NURE) studies of the 1980's (Bolivar, 1980;Shannon, 1980). All of these data are being evaluated as part of the ongoing assessment of the Dillon Resource Area.…”

Section: Methodsmentioning

confidence: 99%

Selected geochemical data for the Dillon BLM Resource Area, including the Virginia City mining district, Madison and Beaverhead Counties, southwest Montana : mineral-resource and mineral-environmental considerations

Hammarstrom¹,

Gosen²

1998

Open-File Report

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Geochemical data on rocks associated with mineral occurrences provide signatures that aid in recognition of the types of mineral deposits that may be present in an area. They also indicate metals, minor elements, or trace elements that may be mobilized from rocks to soils or to waters as rocks are exposed to natural (weathering, landslides) or human-induced (surface disturbance such as road construction or mining) processes. As part of an ongoing study to provide federal land managers with a perspective on the nature of mineral resources in the Dillon BLM Resource Area and intervening areas of the Beaverhead National Forest in Madison and Beaverhead Counties, southwest Montana (fig. 1), 100 samples of rocks and stream sediments were collected during site visits to selected active and abandoned mines, prospects, mineral occurrences, and areas of suspected hydrothermal alteration during the summers of 1994-1996. This report presents geochemical data and sample descriptions for these samples. The Dillon Resource Area covers parts of the Dillon, Bozeman, Ashton, and Dubois 1° by 2° (1:250,000-scale) quadrangles and includes 52 mining districts (fig. 2). Mining district names and boundaries are based on a recent map of mining districts of Montana (Chavez, 1994), which is available in digital form from the Montana State Library's web site (http://nris.mt.gov/nsdi/nris/ab45.eoo.zip). The area of Beaverhead and Madison Counties includes active mines that produce talc, chlorite, placer garnet, and placer gold, as well as exploration projects for gold, talc, and zeolites (McCulloch, 1994). Based on a search of the U.S. Bureau of Mines MAS/MILS database (Kaas, 1996), the area contains over 1,500 historic mines, prospects, and mineral localities (fig. 2). Gold is the principal commodity reported at over onethird of these localities. Precious and base metals, iron, and phosphate account for 75 percent of the occurrences (see inset table on fig. 2). Other commodities reported in the study area include talc, tungsten, manganese, thorium, pumice, sand and gravel, stone, aluminum minerals, silica, garnet, and clays. We focussed our sampling on mining districts where additional geochemical data would help determine the nature of the occurrences and on the districts most likely to experience minerals activity on federal lands in the reasonably foreseeable future. The districts sampled for this report are shown in color on figures 2 and 3. Parts of the Dillon Resource Area that lie within the Dillon 1° by 2° quadrangle (north of 45° 00' N, west of 112° 00' W) were not extensively sampled for this study; the Dillon quadrangle was thoroughly evaluated in previous studies (Pearson and others, 1992; Berger and others, 1983). A few samples were collected from districts in the Dillon quadrangle that have been the focus of very recent exploration. Sites in the Dillon Resource Area were chosen to: (1) elucidate the nature and types of mineral deposits that could be present in the study area; (2) obtain more complete, and modem geochemical d...

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“…NTMS quadrangle sheet (US Geological Survey, 19514). Additional HSSR data are available for the adjacent Bozeman quadrangle (Bolivar, 1979).…”

Section: S H Er I a Nmentioning

confidence: 99%

Uranium hydrogeochemical and stream sediment reconnaissance data release for the Billings NTMS Quadrangle, Montana, including concentrations of forty-three additional elements

Broxton¹

1979

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This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor the United States Department of Enerav, nor any of their employees, nor any of their contractors, subcontractors. o" their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information. apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.

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Uranium hydrogeochemical and stream sediment reconnaissance of the Bozeman NTMS quadrangle, Montana

Cited by 6 publications

References 0 publications

Absence of RNase III alters the pathway by which RNAI, the antisense inhibitor of ColE1 replication, decays

Absence of RNase III alters the pathway by which RNAI, the antisense inhibitor of ColE1 replication, decays

Selected geochemical data for the Dillon BLM Resource Area, including the Virginia City mining district, Madison and Beaverhead Counties, southwest Montana : mineral-resource and mineral-environmental considerations

Uranium hydrogeochemical and stream sediment reconnaissance data release for the Billings NTMS Quadrangle, Montana, including concentrations of forty-three additional elements

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